Guiding attachment for sewing-machines



(No Model.) 2 Sheets-Sheet 1.

- I. KOSOHTIAL.

GUIDING ATTAGHMENT FOR SEWING MACHINES.

2 Sheets-Sheet 2.

(No Model.)

F. KOSGHTIAL. GUIDING ATTACHMENT FOR SEWING MACHINES. No. 542,858.

Patented July 16 fill 872107":

m m g .3 V u In Witness es.-

y fim 91mm FRANZ KOSCHTIAL, OF I -IOBOKEN, NEW JERSEY.

GUIDING ATTACHMENT FOR SEWING-=-IVIACHINES.v

SPECIFICATION forming part of Letters Patent No. 542,858, dated July 16, 1895.

Application filed November'26, 1894. SerialNo. 529,939- (No model.)

To all whom it may concern.-

Be it known that I, FRANZ KOSCHTIAL, of Hoboken, Hudson county, New Jersey, have invented an Improved Guiding Attachment for Sewing-Machines, of which the following is a specification.

This invention relates to a guiding attachment for sewing-machines which ,will properly present the work to the needle, so that the operator need not assist or guide the same by his hands. Thus one operator can oversee a number of machines, which will all work entirely automatically and need only be looked after from time to time, without requiring manual assistance.

In the accompanying drawings, Figure 1 is a side elevation of my improved guiding attachment; Fig.2, a plan thereof; Fig. 3, a rear elevation, partly in section, of the upper spool-carrier; Fig. 4, a rear view of the tension mechanism; Fig. 5, a cross-section on line 5 5, Fig. 4; Fig. 6, a rear view of the guidebar (1; Fig. 7, a cross-section on line 7 7, Fig. 6; Fig. 8, a rear view, partly in section, of the folder; Fig. 9, a cross-section on line 9 9, Fig. 8; and Fig. 10, an end view of the platef.

The letter A represents the table of a sewing-machine, and a is the work-plate. Upon the plate a is supported one end of the guideplate I), which is also supported by means of a rail 1) upon the table A. The rail 1) is slotted at its ends, as at W, for the reception of clamp-screws b by which the plate I) is secured to the rail, so as to be laterally adj ustable. Near its rear end the plate 6 is provided with the tension-bar c, beneath which the work B passes and by which the work is held down tightly upon the face of the plate.

The tension-bar c is attached to the plate 12 by means of the set-screws c, Fig. 4., surrounded by coiled springs 0 so that the bar is free to yield vertically under pressure. To one face of the bar 0 there is secured by screws 0 the clamp-bar 0 between which and the bar 0 the upwardlyturned ends of a folded flexible strip 0 are confined, Fig. 5. Within the fold of this strip there is placed a rod 0 which stiffens the same and causes the lower side of the strip 0 to bear upon the work B, so as to produce the desired amount of frictional tension. After the work has cleared the tension device 0 it passes under a guide bar or rail d, Fig. 6, secured to the plate 1) by the set-screws d, surrounded by the coiled springs d Into the bar 01 there is cut a longitudinal keyway. or groove d which is engaged by the clamp-screws d of a pair of gages 01 These gages are in this waylongitudinally adjustable upon the bar d, and they should be set at such a distance apart as to permit the passage of the work between them without lateral deflection. Lugs d depending from the gages d and entering a slot d of plate I), prevent the work from slipping with its edges beneath the gages.

-In front of the bar dthere maybe placed a folder for upsetting one edge B, Fig. 2, of work B. This folder consists of a folding-bar 6, Fig. 8,1ongitudin'ally adjustable on a divided grooved rail 6, which it engages by a feather 6 One end of this bar is reduced, as

ate and around this reduced end the fold B is formed by the downwardly-projecting finger e of a hemmer 6 which is longitudinally adjustable upon the rail e by clampscrew e By drawing the bar 6 in or out to any suitable extent and properly setting the hemmer e the location and size of the fold may be readily adjusted.

The rail 6', together with the bar e, is pressed down at one end upon the work by a presser-plate a, free to move vertically upon the pins e surrounded by the coiled springs a These pins carry above the presser-plate e a fixed plate 6 through which projects the clamp-screw e The other end of rail 8' may be pressed down by set-screw e surrounded by coiled spring 6 By setting the screws e e the pressure of the bar e upon the work B may be regulated. Of course when the folder is used the gages d and hemmer e together with rod e, are so set that the fold B is fed to the needle.

Before the work reaches the needle it is guided along one edge by a hook f, projecting upwardly from a plate f,which is secured above plate a to the lower face of plate b by means of the lugs f*. The work thus finally reaches the needle D in a proper rectilinear position and will be maintained in such position as it is drawn along by the feed-dog g.

In order to sew a ribbon to the upper and lower face of the work I employ two reels h i, of which one is placed above the plate I) and the other below the table A. The reel h, Fig. 3, is hung upon a shaft h betweena pair of heads 7L2, to which it is clamped by a spring 71. and nut 71.4. The shaft h is connected to a standard 7L terminating at its lower end in a claw h, that engages a rail h". The upright 715 is adjustable laterally upon the rail and may be clamped in any desired position by a screw lbs. The rail h is secured to the plate b above the work 13 by means of the screws h surrounded by sleeves h upon which the rail rests. Through an inclined perforation h of upright it passes an inclined arm h, which may be clamped in position by screw h. The upper ribbon E passes from the reel it through a forked guide it, which is adjustabiy secured tov upright h by screw 71. Thence the ribbon E passesthrough asimilar guide h, Fig. 2, secured to the free end of arm 71 by set-screw h", and is finally exposed to the action of the needle.

The lower reel z' is secured to the table A by hanger 1". From the reel 1' the lower ribbon F passes through a slot A of table A and through a slot-f of platef, Fig. 10, to the upper face of plate a and under an arm 1 of plate f, to be finally sewed down by the needle.

The platef is provided at its end with teeth j, that are engaged by the spring-finger) of a gage f. This gage embraces the plate f and forms a stop, against which one edge of the ribbon E is guided. By setting the gage farther in or out the machine is adjusted to different widths of ribbons.

It will be seen that by my invention not only the fabric B but also the ribbons E E are so guided that they will always be fed under the needle with a proper rectilinear motion. Thus, when the machine is driven by a motor, it is entirely automatic and needs only a general supervision, which enables a single operator to tend a large number of machines.

\Vhat I claim is- 1. A guide attachment for sewing machines consisting of a guide plate, a vertically yielding tension bar, a rail, extending across the guide plate at adistance above the same, gages adjustable on said rail, a cloth feeding device, and a stitch forming mechanism, substantially as specified.

2. The combination of a slotted guide plate with a guide rail and a pair of adjustable gages having depending lugs d, that engage the slot in the guide plate, substantially as specified.

3. Thecombination of a guide plate with a rail 7L7, a standard 7L5, adjustable thereon, a reel-snpportin g shaft secured to the standard, a forwardly projecting arm h, and a pair of ribbon guides secured to the standard and the arm respectively, substantially as specified.

4. The combination of a main guide plate with a stitch forming mechanism, a lower reel, a slotted guide plate f, having teeth, and located between the main guide plate and the stitch forming mechanism and a gage f, having a finger that is adapted to engage said teeth, substantially as specified.

5. Aguide attachment for sewing machines composed of a main guide plate, a tension bar, a guide bar, gages adjustable thereon,an upper and lowerribbon support, and an upper and lower ribbon guide, substantially as specitied.

Signed at New York, in the county of New York and State of New York, this 23d day of November, A. D. 1894.

- FRANZ KOSCIITIAL. Witnesses:

F. v. BRIESEN,

WILLIAM SoHULz. 

